DCM2204 ENVIRONMENTAL SCIENCE JULY-AUG 2025

Description

SESSION	JULY-AUG 2025
PROGRAM	BACHELOR OF COMMERCE (BCOM)
SEMESTER	IV
COURSE CODE & NAME	DCM2204 ENVIRONMENTAL SCIENCE

 

 

 

Assignment Set – 1

 

 

Q1. What is the concept of sustainability? Discuss various principles of sustainability and their application in development planning.          2+8     

Ans 1.

Concept of Sustainability and Its Principles

Concept of Sustainability

Sustainability refers to the capacity of human society to meet present needs without compromising the ability of future generations to meet their own needs. It stresses the balance between economic development, environmental protection, and social well-being. The concept acknowledges that resources are finite, ecosystems are fragile, and developmental activities must be designed to ensure long-term ecological stability, economic growth, and human welfare. Sustainability also promotes responsible consumption,

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Q2. Describe the carbon cycle in detail. What are the differences between the biological and geological carbon cycles? Explain how human activities are affecting the carbon cycle.     10       

Ans 2.

Carbon Cycle, Its Types, and Human Impact

Carbon Cycle

The carbon cycle is a fundamental biogeochemical cycle through which carbon moves between the atmosphere, biosphere, hydrosphere, and lithosphere. Carbon exists in various forms such as carbon dioxide, organic matter, fossil fuels, and marine carbonates. The cycle begins when plants absorb atmospheric CO₂ during photosynthesis, converting it into organic matter. This carbon enters food chains as animals consume plants. When plants and animals

 

 

Q3. Discuss the various types of renewable energy sources. How can their use benefit the environment?      7+3           

Ans 3.

Renewable Energy Sources and Environmental Benefits

Types of Renewable Energy Sources

Renewable energy sources are natural energy flows that can be regenerated continuously and do not deplete with use. One of the most important sources is solar energy, which involves harnessing sunlight through photovoltaic panels or solar thermal systems. It is abundant, clean, and suitable for both small-scale household use and large solar farms. Wind energy is another significant renewable resource, generated by converting the kinetic energy of wind into electricity through wind turbines. It is especially suitable for coastal regions and open

 

 

Assignment Set – 2

 

 

Q4. Compare and contrast in-situ and ex-situ conservation methods. Explain their advantages and limitations.             6+4     

Ans 4.

In-situ and Ex-situ Conservation: Comparison, Advantages, and Limitations

Comparison of In-situ and Ex-situ Conservation

In-situ conservation refers to the protection and management of species within their natural habitats. It ensures that plants, animals, and microorganisms continue to live and evolve in the ecosystems where they have developed over time. This method focuses on maintaining natural ecological processes, gene flow, and species interactions. Examples include national parks, wildlife sanctuaries, biosphere reserves, and protected forests. In-situ conservation

approach is essential for effective biodiversity conservation.

 

 

Q5. Describe the Air Quality Index (AQI) system in detail. How is it calculated and interpreted?       10       

Ans 5.

Air Quality Index (AQI): Calculation and Interpretation

Meaning and Purpose of the AQI

The Air Quality Index (AQI) is a numerical system used to measure and communicate the quality of air in a specific location. It converts complex air pollution data into a simple, understandable scale that indicates how clean or polluted the air is. AQI helps assess potential health impacts associated with various levels of air pollution, enabling governments, industries, and citizens to take precautionary measures. It also serves as an indicator of

 

 

Q6. What are different sources of noise pollution, briefly explain. Also, what are the effects of noise pollution on human health.  7+3

Ans 6.

Sources and Effects of Noise Pollution

Sources of Noise Pollution

Noise pollution refers to unwanted or harmful sound that disrupts the normal functioning of life and causes discomfort or health risks. One major source of noise pollution is transportation. Road traffic, honking, heavy trucks, buses, and motorcycles contribute significantly to noise levels in urban areas. Airports also generate high-level noise due to aircraft take-offs, landings, and associated ground operations. Railway engines, horns, and